In an era defined by a dispiriting war and a surreal Washington scandal, Secretariat gave Americans and their bruised psyche something to cheer about when the big thoroughbred captured the Triple Crown in 1973.

The racehorse considered by many to be the best ever and the housewife-turned-breeder who soared in a male-dominated sport are now coming to the big screen.

Secretariat has begun filming in Kentucky with Diane Lane portraying owner Penny Chenery and John Malkovich cast as trainer Lucien Laurin.

Mayhem Pictures, with the backing of Walt Disney Pictures, is producing Secretariat. Mayhem's other uplifting sports-themed stories include Miracle, about the 1980 US Olympic ice-hockey team, and The Rookie and Invincible, both Walter Mitty tales.

Randall Wallace, who directed We Were Soldiers, is directing. A fall 2010 release is expected.

Unlike Seabiscuit, the 2003 movie based on the undersized thoroughbred who buoyed the spirits of a Depression-era nation, Secretariat will focus on Chenery's improbable success in the old money, bourbon-sipping world of horse breeding and the chestnut stallion's stirring record-shattering run for the Triple Crown. Like Seabiscuit, the nation's mood - in this case, the era of Watergate and Vietnam - is key to the storytelling.

"Really, it's Penny's story," producer Mark Ciardi said of Chenery, who left her life in Denver to take over ailing father Christopher Chenery's faltering horse-breeding farm 20 miles north of Richmond in Doswell.

"Her coming into a man's world, learning and rekindling this love she had of horse-racing," Ciardi said, shorthanding elements of Chenery's story. "She's this woman in a man's world, just doing what she has to do."